Sharpe pretends to shoot his friend who flails his arms and then falls to the ground. “Ah crap,” Sharpe says.

In another video, Sharpe and a friend act out a quest to take out a fictitious drug dealer while brandishing guns, one which appears to be real. And a video from last Halloween shows Sharpe shooting a friend with a toy gun as the friend exclaims, “Ow!” the outlet reported.

Numerous students and witnesses to the attack identified the shooter as Sharpe, who they say rode a bus to school with two guns stashed in a duffel bag before opening fire outside a biology classroom, fatally shooting one boy, Sam Strahan, who tried to stop the rampage, and injuring three teen girls.

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Police interviewed over 100 people to determine a motive for the attack and said the shooter was prompted by “a bullying type of situation.”

Students described the alleged shooter as “nice, funny and weird,” and said he did not seem like “that person who had issues.”

Sharpe had recently become obsessed with school shooting documentaries and had written notes to some of his friends saying he planned to do “something stupid,” according to Michael Harper, 15, a student at the school. They weren’t sure whether to take them seriously but one note was passed to a counselor, Harper said.

“He was weird, and he loved the show ‘Breaking Bad,'” Harper said, referencing the 2013 TV series about a math teacher turned meth dealer.

Sharpe is being held in the county’s juvenile detention center, the outlet reported.